School of Physics Lecture Demonstration Manual

Na-12 Black Body Hole

Published: Tuesday 05 June 2007 - Updated: Thursday 31 March 2011


To simulate a blackbody emitter and demonstrate that a blackbody is a perfect emitter.



Click on pictures to enlarge.

Black body Hole pic 1

Black body Hole pic 2

Black body Hole pic 5

Black body Hole pic 3

Black body Hole pic 4


The blackbody emitter consists of a carbon rod with a small 1mm blind hole in the center. The apparatus is connected to the Lecture theater low voltage power supply and the variac slowly increased till a current of approximately 30 Amps is produced. The video camera is focused on the center plugged hole and the image compared in IR night vision mode and normal mode.

Safety notes

Electrical Safety 

Fire/Burn Safety 


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